The Great Earthquake of San Francisco
The Richter scale is used to measure the strength of an earthquake. The Great Earthquake of San Francisco is thought to have measured a 7.9. In 2010 in Haiti there was a devastating earthquake that measured 7.1. What is the difference in strength of the two earthquakes? Use a visual model to prove your solution.
The Great Earthquake and First of San Francisco occurred in 1906. How many years ago did it take place? Explain.
The damage caused in 1906 was 400 million dollars. That is equivalent to 7 billion dollars today. How much has the value of a dollar increased since 1906? Explain.